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Finding the Fourth Proportional to 120,007.74, 165,596.49 and 66,289.53

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Solution

The fourth proportional to 120,007.74, 165,596.49 and 66,289.53 is: 91,471.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,007.74 : 165,596.49 = 66,289.53 : x
  2. Step 2: Convert to fraction form
    120,007.74/165,596.49 = 66,289.53/x
  3. Step 3: Cross multiply
    120,007.74x = 165,596.49 × 66,289.53
  4. Step 4: Simplify right side
    120,007.74x = 10,977,313,491.75
  5. Step 5: Solve for x
    x = 10,977,313,491.75/120,007.74
  6. Step 6: Final answer
    x = 91,471.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.